New Discovery and Exploration Methods of Porphyry and Epithermal Mineral Deposits

A special issue of Minerals (ISSN 2075-163X). This special issue belongs to the section "Mineral Deposits".

Deadline for manuscript submissions: 30 November 2024 | Viewed by 2396

Special Issue Editors


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Guest Editor
1. London Centre for Ore Deposits and Exploration, Natural History Museum, London, UK
2. College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
Interests: geology and genesis of porphyry-related deposits; stable isotopes; indicator minerals for exploration and porphyry fertility
College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
Interests: gold deposits; porphyry–skarn–epithermal ore system; fluid inclusions
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
College of Earth Science, Chengdu University of Technology, Chengdu 610059, China
Interests: geology of epithermal Au-Sb-Pb-Zn deposits; mineralization process of skarn deposits; fractionated leucogranite in the Himalayas

Special Issue Information

Dear Colleagues,

As one of the most valuable deposit types, porphyry deposits are of great interest to both industry and academia. Porphyry deposits and their genetically and spatially correlated epithermal deposits are common topics of exploration and genesis research, representing one of the most deeply understood deposit types. However, new discoveries and insights into its formation and exploration emerge relatively frequently, which improve our understanding of porphyry deposits while providing better exploration strategies for new exploration campaigns. To keep the industry and academia updated with knowledge of recent discoveries and progress in metallogeny and exploration methods of porphyry and epithermal deposits, we are organizing a Special Issue to disseminate knowledge about the geology, geochronology, hydrothermal process, indicator minerals, geochemistry, geophysics, and spectroscopy of porphyry and epithermal deposits. Topics of interest for this Special Issue of Minerals, “New Discovery and Exploration Methods of Porphyry and Epithermal Deposits”, include but are not limited to the following:

  1. Geology of recently discovered porphyry and/or epithermal deposits;
  2. Formation processes of porphyry and epithermal deposits;
  3. New exploration tools for porphyry and epithermal deposits.

Dr. Chao Yang
Dr. Yiwei Peng
Dr. Gangyang Zhang
Guest Editors

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Keywords

  • porphyry
  • epithermal
  • formation
  • geology
  • exploration

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Published Papers (2 papers)

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Research

26 pages, 8922 KiB  
Article
Comparative Study of Sulfides from Porphyry, Skarn, and Carbonate-Replacement Mineralization at the Recsk Porphyry-Mineralized Complex, Hungary
by Máté Biró, Johann G. Raith, Monika Feichter, Máté Hencz, Gabriella B. Kiss, Attila Virág and Ferenc Molnár
Minerals 2024, 14(9), 956; https://doi.org/10.3390/min14090956 - 21 Sep 2024
Viewed by 466
Abstract
A calc–alkaline dioritic–andesitic–dacitic intrusive–volcanic complex of Early Oligocene (30 Ma) age and its Mesozoic sedimentary basement at Recsk host a well-preserved porphyry–skarn–polymetallic carbonate-replacement–epithermal mineral system. The unique occurrence offers an exceptional possibility to study these related mineralization types at a single locality. This [...] Read more.
A calc–alkaline dioritic–andesitic–dacitic intrusive–volcanic complex of Early Oligocene (30 Ma) age and its Mesozoic sedimentary basement at Recsk host a well-preserved porphyry–skarn–polymetallic carbonate-replacement–epithermal mineral system. The unique occurrence offers an exceptional possibility to study these related mineralization types at a single locality. This study presents the textural–paragenetic, compositional characteristics, and systematics of sulfide mineral assemblages for the porphyry, skarn, and carbonate-replacement ore types, which are currently situated at a depth of 500–1200 m below the present surface. Detailed petrography combined with EPMA analyses of molybdenite, galena, sphalerite, tetrahedrite-group minerals and Bi-bearing sulfosalts allows for the establishment of characteristic mineral and chemical fingerprints for each mineralization type. Rhenium concentration in molybdenite, occurring as rare disseminations and quartz–carbonate veinlets in altered host rocks in all three mineralization types, shows a decreasing trend towards the more distal mineralization types. High Re contents (x¯ = 1.04 wt.%, max. up to 4.47 wt%) are typical for molybdenite from the porphyry mineralization, but Re is not homogeneously distributed, neither within individual molybdenite crystals nor on a mineralization scale. Copper and Se show opposite behavior in molybdenite, both becoming enriched in the more distal mineralization types. Silver, Bi, and Se concentrations increase in galena and tetrahedrite-group minerals, both towards the country rocks, making them the best candidates for vectoring within the whole hydrothermal system. For tetrahedrite-group minerals, Ag, Bi, Se, together with Sb and Zn, are the suitable elements for fingerprinting; all these are significantly enriched in the distal carbonate-replacement mineralization compared to the other, more proximal ore types. Additionally, further trends can be traced within the composition of sulfosalts. Lead-bearing Bi sulfosalts preferentially occur in the polymetallic carbonate-replacement veins, while being under-represented in the skarn and porphyry mineralization. Porphyry mineralization hosts Cu-bearing Bi sulfosalts dominantly, while skarn is characterized by Bi-dominated sulfosalts. Sphalerite, although present in all mineralization types, cannot be used for fingerprinting, vectoring, or thermobarometry based on EPMA measurements only. Trace element contents of sphalerite are low, often below the detection limits of the analyses. This is further complicated by the intense “chalcopyrite disease” occurring throughout the distal mineralization types. All the above-listed major, minor, and trace element ore mineral characteristics enable the characterization of the Recsk ores by mineral geochemical fingerprints, providing a possible vectoring tool in porphyry Cu–(Mo)–Au-mineralized systems. Full article
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30 pages, 15303 KiB  
Article
Discovery and Exploration of the Luming Porphyry Mo Deposit, Northeastern China: Implications for Regional Prospecting
by Bangfei Gao, Minghua Dong, Hui Xie, Zhiliang Liu, Yihang Li and Tong Zhou
Minerals 2024, 14(7), 718; https://doi.org/10.3390/min14070718 - 16 Jul 2024
Viewed by 975
Abstract
Over the past two decades, significant deposit discoveries were made in Northeastern China, including the super-large Chalukou, Daheishan, and Luming porphyry Mo deposits. The discovery of the Luming deposit was accomplished through verification of stream sediment anomalies, with mineralization closely associated with early [...] Read more.
Over the past two decades, significant deposit discoveries were made in Northeastern China, including the super-large Chalukou, Daheishan, and Luming porphyry Mo deposits. The discovery of the Luming deposit was accomplished through verification of stream sediment anomalies, with mineralization closely associated with early Jurassic monzogranite and granite porphyry. Previous studies primarily focused on the mineralization mechanisms of these deposits without adequately addressing the exploration methods and prospecting criteria. This study involved a comprehensive re-evaluation of geological observations, analysis of rock primary halo, gravity and magnetic surveys, and induced polarization surveys conducted during exploration campaigns at the Luming porphyry Mo deposit. The results suggest that hydrothermal breccias play a critical role in controlling the mineralization by forming a central low-grade core within the deposit while the Mo mineralization and hydrothermal alteration exhibit a donut-shaped distribution around it. The primary halo shows a distinct metal zonation moving from a central W-Bi-Mo-(Sb) to a peripheral Cu-Co-Ni and a distal Pb-Zn-Ag-In. The mineralization zone exhibits a low Bouguer gravity anomaly, negative magnetic anomaly, medium to low resistivity, and moderate to high chargeability, indicating the effectiveness of geophysical methods in defining the extent of the ore body. The Luming porphyry Mo deposit and distal skarn-epithermal Pb-Zn mineralization are parts of a porphyry-related magmatic-hydrothermal system. The results of this study offer valuable insights into the genesis of porphyry Mo deposits and their implications for prospecting in the forested region of Northeastern China. Full article
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

1. Title: Petrographic and EPMA studies of major sulfide phases from the Cu-porphyry, Cu-Zn skarn and polymetallic carbonate-replacement mineralization at the Recsk porphyry mineralized complex, Hungary
Authors: Máté Biró, Monika Feichter, Johann G. Raith, Máté Hencz, Gabriella B. Kiss, Ferenc Molnár

2. Title: Tectono-Metallogenic Evolution of Eocene Cu-W-Mo±Au Porphyry/Skarn Mineralizations around Uludağ: Implications for Source, Geochronology, and Tectonic Setting
Authors: Huseyin Kocaturk et al.

3. Title: An Archean porphyry-type deposit: Cu-Au mineralization associated with the Chibougamau tonalite-diorite pluton, Abitibi greenstone belt, Canada
Authors: Daniel Kontak et al.

4. Title: Alteration lithogeochemistry of an Archean intrusion-related Au(-Cu) deposit: The Côté Gold deposit, Abitibi Greenstone Belt, Ontario
Authors: Daniel Kontak et al.

5. Title: Geology, petrology and geochronology of the Late Cretaceous Klaza epithermal deposit: A window into the petrogenesis of an emerging porphyry belt in the Dawson Range, Yukon, Canada
Authors: Daniel Kontak et al.

6. Title: Evaluating granite fertility utilizing porphyry indicator minerals and geochemical data: a case study from an emerging metallogenic province in the Taimyr Peninsula, Russian High Arctic
Authors: Berzin S.V., Konopelko D.L., Petrov S.V., Proskurnin V.F., Berzon E.I., Kurapov M.Yu., Golovina T.A., Chernenko N.Ya., Chervyakovskiy V.S. Palamarchuk R.S.

7. Title: The Paleoproterozoic Raimunda porphyry-type gold deposit, Juruena Mineral Province, Amazonian Craton (Brazil): constraints based on petrological, fluid inclusion and stable isotope data
Authors: Lopes, Adriana A.C.; Moura, Marcia A.

8. Title: Geochronology, geochemistry and zircon Hf isotopic composition of ore-bearing volcanic rocks at Lazong Ag-Pb-Zn deposit, southern Tibet, China: Petrogenetic, metallogenic and tectonic implications
Authors: Leng Qiufeng, Cao Huawen, Zhang Tengjiao, Zhu Sibao

9. Title: Apatite and zircon geochemistry deciphers difference in the nature of ore-forming magma at the Bangpu porphyry Mo-Cu deposit, Tibet
Authors: Pan Tang, Juxing Tang, Liqiang Wang, Bin Lin, Faqiao Li, Jing Qi, Mengdie Wang, Yan Xiong, Jinlin Xie and Gang Tao

10. Title: Geochronology and geochemical characteristics of gneissic granite in Nanwenhe Skarn type tungsten deposit, Yunnan
Authors: Zhang gangyang et al.

11. Title: Detrital chalcopyrite geochemistry as a tool for exploration of porphyry deposits: a case study in Duolong district, Tibet
Authors: Chao Li, Chao Yang, Tingting Wang, Qin Wang

12. Title: Ore genesis of the Tawuerbieke gold deposit, Western Tianshan, NW China: Evidence from the texture, compositions and S-Pb isotopes of sulphides
Authors: Yiwei Peng et al.

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